diff --git a/apps/cpman/src/main/java/org/onosproject/cpman/ControlLoad.java b/apps/cpman/src/main/java/org/onosproject/cpman/ControlLoad.java
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+++ b/apps/cpman/src/main/java/org/onosproject/cpman/ControlLoad.java
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+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.onosproject.cpman;
+
+import org.onosproject.net.statistic.Load;
+
+import java.util.concurrent.TimeUnit;
+
+/**
+ * Data repository for control plane load information.
+ */
+public interface ControlLoad extends Load {
+
+    /**
+     * Obtains the average of the specified time duration.
+     *
+     * @param duration time duration
+     * @param unit     time unit
+     * @return average control plane metric value
+     */
+    long average(int duration, TimeUnit unit);
+
+    /**
+     * Obtains the average of all time duration.
+     *
+     * @return average control plane metric value
+     */
+    long average();
+}